647  
CDUS46 KMTR 060031  
CLIAPC  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA  
531 PM PDT TUE SEP 05 2023  
   
...............................
 
 
   
..THE NAPA AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 5 2023
 
 
VALID TODAY AS OF 0500 PM LOCAL TIME.  
 
CLIMATE NORMAL PERIOD: 1991 TO 2020  
CLIMATE RECORD PERIOD: 1998 TO 2023  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................
 
 
TEMPERATURE (F)  
TODAY  
MAXIMUM 80 3:13 PM 111 2022 81 -1 111  
MINIMUM 58 1:56 AM 44 2005 53 5 59  
2010  
2015  
AVERAGE 69 67 2 85  
 
PRECIPITATION (IN)  
TODAY 0.00 0.00  
MONTH TO DATE 0.01 0.00  
SINCE OCT 1 29.52 17.99  
SINCE JAN 1 21.10 2.85  
 
DEGREE DAYS  
HEATING  
TODAY 0 0  
MONTH TO DATE 0 0  
SINCE SEP 1 0 0  
SINCE JUL 1 8 15  
 
COOLING  
TODAY 4 20  
MONTH TO DATE 17 46  
SINCE SEP 1 17 46  
SINCE JAN 1 290 357    
...............................................................
 
 
WIND (MPH)  
RESULTANT WIND SPEED 5 RESULTANT WIND DIRECTION SW (210)  
HIGHEST WIND SPEED 15 HIGHEST WIND DIRECTION S (190)  
HIGHEST GUST SPEED 18 HIGHEST GUST DIRECTION S (190)  
AVERAGE WIND SPEED 5.9  
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.5  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
HAZE  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 87 2:00 AM  
LOWEST 47 2:00 PM  
AVERAGE 67  
   
......................................................
 
 
THE NAPA AIRPORT CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 81 115 2022  
MINIMUM TEMPERATURE (F) 52 42 2015  
 
SUNRISE AND SUNSET  
SEPTEMBER 5 2023.....SUNRISE 6:42 AM PDT SUNSET 7:33 PM PDT  
SEPTEMBER 6 2023.....SUNRISE 6:43 AM PDT SUNSET 7:31 PM PDT  
 
- INDICATES NEGATIVE NUMBERS.  
R INDICATES RECORD WAS SET OR TIED.  
MM INDICATES DATA IS MISSING.  
T INDICATES TRACE AMOUNT.  
 

 
 
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